/Engine/Source/Editor/AnimGraph/Public/AnimGraphNode_Base.h
Gives each visual node a chance to validate that they are still valid in the context of the compiled class, giving a last shot at error or warning generation after primary compilation is finished.
virtual void ValidateAnimNodePostCompile ( [FCompilerResultsLog](API\Editor\UnrealEd\Kismet2\FCompilerResultsLog) & MessageLog, [UAnimBlueprintGeneratedClass](API\Runtime\Engine\Animation\UAnimBlueprintGeneratedClass) * CompiledClass, int32 CompiledNodeIndex )